The 'Irish Blood, English Heart' singer recently opened up to The Hollywood Reporter about LA's The Staples Center going meat-free for his concert on Friday (March 1), despite the venue declining a similar request from McCartney.

"I was amused to hear that Sir Paul McCartload was very angry that Staples had said yes to me but no to him, when really, he should be happy for any victory on behalf of the animals," Morrissey declared.

He continued: "I know he works tirelessly for the People for the Ethical Treatment of Animals (PETA) but he also loves the British royals, whose treatment of animals is abysmal."

Morrissey went on to suggest that it was irresponsible for McCartney to have accepted a knighthood from Queen Elizabeth II in March 1997.

"The Queen herself wears enough fur to blanket most of Russia. He also once sang 'Give Ireland Back to the Irish', which was directed at the Queen," the musician noted.

"Well, she refused, and she still refuses, yet Sir Paul gives her the thumbs up! If he cared passionately about animals, he'd return his knighthood. He doesn't need the Queen's approval. He's given more pleasure to people worldwide than she could ever dream of."

"As far as my reputation is concerned, I can't take the risk of being on a show alongside people who, in effect, amount to animal serial killers. If Jimmy cannot dump Duck Dynasty, then we must step away," Morrissey explained in a statement confirming his cancellation.